Rt 31 over Musconetcong River
FairHunterdon County, New Jersey · 0.75 MI So of CR 632 · Structure no. 1013159
- Built
- 1931
- 94 years old, rebuilt 1978
- Condition
- Fair
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 168 ft
- 3 main spans
- Daily traffic
- 23,006
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Rt 31 over Musconetcong River is a steel stringer/multi-beam or girder carrying Rt 31 over Musconetcong River in Hunterdon County, New Jersey. It was built in 1931 and reconstructed in 1978, so it is 94 years old, older than the New Jersey average of 58.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 23,006 vehicles a day, roughly 4% of them trucks, projected to reach 27,607 by 2043. The structure is 168 ft (51.2 m) long and 50 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Rt 31 over Musconetcong River built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1978.
What condition is Rt 31 over Musconetcong River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.
How much traffic does Rt 31 over Musconetcong River carry?
About 23,006 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Rt 31 over Musconetcong River?
The structure is 168 ft (51.2 m) long with a longest span of 53 ft (16.2 m) and a deck 50 ft wide.
Who owns Rt 31 over Musconetcong River?
It is owned by the State Highway Agency.